int main(){  
    printf("it's the main process step 1!!\n\n");  
  
    fork();  
  
    printf("step2 after fork() 1!!\n\n");  
   fork();  
  
    printf("step2 after fork() 2!!\n\n");  
  
  
    int i; scanf("%d",&i);   //prevent exiting  
    return 0;  
}  
